1070ti Fivem performance

I am thinking of buying 1070ti for Fivem. Anyone has experiences?

If it can run GTAV, you can expect about the same performance - maybe a little worse due to custom assets, but not by a whole lot - in FiveM, as a general rule. The 1070ti is one of the most popular GPUs out there, even now, so there should be a plethora of benchmarks online that you can base your expectations on.